| vacuum tube |
a tube contaning a low pressure gas and two or more metal plates that control the flow of electrons.
출처: www.icknowledge.com/glossary/v.html
|
|---|---|
| vacuum aspiration |
procedure in which a suction tube attached to a vacuum pump is inserted through the vagina into the uterus to loosen and remove its contents.
출처: www.holyname.org/health_information_resources/heal...
|
| vacuum extractor |
An instrument that attaches to the baby's head and helps guide it out of the birth canal during delivery.
출처: pregnancytoday.com/reference/library/glossary.htm
|
| vacuum |
Space that contains very little matter in a given volume (eg, a region in which air has been removed).
출처: www.wwnorton.com/college/geo/earth2/glossary/v.htm
|
| vacuum |
The state of negative pressure. Reflects how thoroughly air is removed from within a jar of processed food--the higher the vacuum, the less air left in the jar.
출처: doityourself.com/canning/canningglossary.htm
|